Definition of "allheal"

Any of several plants supposed to have broad healing powers.

1. Prunella vulgaris, a species in the mint family.  examples

2. Stachys, a genus of plants in the mint family, heal-all, self-heal, woundwort, betony, lamb's ears, hedgenettle.  examples

3. Valeriana officinalis, a species in the valerian family.  examples